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Task planning revised

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This commit is contained in:
Patrick Asmus
2026-07-14 19:28:08 +02:00
parent e7d116b099
commit e18e399ba7
1 changed files with 94 additions and 48 deletions
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142
docs/task-scheduler.md
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@@ -51,24 +51,58 @@ Den Rest wie oben, nur den Trigger austauschen.
### Monatlich (z.B. erster Montag im Monat um 04:00 Uhr)
```powershell
$trigger = New-ScheduledTaskTrigger -Weekly -DaysOfWeek Monday -WeeksInterval 1 -At "04:00"
`New-ScheduledTaskTrigger` bietet keine `-Monthly`-Option mit Wochentag, und die CIM-Klasse
`MSFT_TaskMonthlyDOWTrigger` wird von `Register-ScheduledTask` nicht akzeptiert ("Falscher Parameter").
Daher wird die Aufgabe per XML über `schtasks.exe` erstellt:
# New-ScheduledTaskTrigger bietet kein -Monthly mit Wochentag-Option,
# daher wird der CIM-Trigger verwendet (entspricht GUI → "Monatlich"):
$trigger = New-CimInstance -CimClass (
Get-CimClass -Namespace "Root/Microsoft/Windows/TaskScheduler" `
-ClassName "MSFT_TaskMonthlyDOWTrigger"
) -ClientOnly -Property @{
DaysOfWeek = [int16]2 # Montag (So=1, Mo=2, Di=4, Mi=8, Do=16, Fr=32, Sa=64)
WeeksOfMonth = [int16]1 # Erste Woche
Months = [int16]4095 # Alle 12 Monate (Bit-Summe: 1+2+4+...+2048)
Enabled = $true
}
$trigger.StartBoundary = (Get-Date "04:00").ToString("yyyy-MM-dd'T'HH:mm:ss")
```powershell
$startDate = (Get-Date "04:00").ToString("yyyy-MM-dd'T'HH:mm:ss")
$xml = @"
<?xml version="1.0" encoding="UTF-16"?>
<Task version="1.2" xmlns="http://schemas.microsoft.com/windows/2004/02/mit/task">
<Triggers>
<CalendarTrigger>
<StartBoundary>$startDate</StartBoundary>
<Enabled>true</Enabled>
<ScheduleByMonthDayOfWeek>
<Weeks><Week>1</Week></Weeks>
<DaysOfWeek><Monday /></DaysOfWeek>
<Months>
<January /><February /><March /><April /><May /><June />
<July /><August /><September /><October /><November /><December />
</Months>
</ScheduleByMonthDayOfWeek>
</CalendarTrigger>
</Triggers>
<Principals>
<Principal id="Author">
<UserId>S-1-5-18</UserId>
<RunLevel>HighestAvailable</RunLevel>
</Principal>
</Principals>
<Actions Context="Author">
<Exec>
<Command>powershell.exe</Command>
<Arguments>-ExecutionPolicy Bypass -NoProfile -File "C:\scripts\windows-updater\windows-updater.ps1"</Arguments>
</Exec>
</Actions>
<Settings>
<AllowStartOnDemand>true</AllowStartOnDemand>
<StartWhenAvailable>true</StartWhenAvailable>
<AllowHardTerminate>true</AllowHardTerminate>
<ExecutionTimeLimit>PT2H</ExecutionTimeLimit>
<DisallowStartIfOnBatteries>false</DisallowStartIfOnBatteries>
<StopIfGoingOnBatteries>false</StopIfGoingOnBatteries>
</Settings>
</Task>
"@
$xmlPath = "$env:TEMP\windows-updater-monthly.xml"
$xml | Out-File -FilePath $xmlPath -Encoding Unicode
schtasks.exe /Create /TN "Windows Updater - Monthly" /XML $xmlPath /F
Remove-Item $xmlPath
```
Den Rest wie beim täglichen Beispiel, nur den Trigger austauschen.
**Wochentag/Woche anpassen**: `<Monday />` durch den gewünschten Tag ersetzen (`<Sunday />`, `<Tuesday />`, etc.), `<Week>1</Week>` durch die gewünschte Woche (1-4) oder `<Last />` für die letzte Woche.
### Defender-Updates alle 4 Stunden
@@ -105,40 +139,52 @@ Zwei Aufgaben anlegen — eine für Defender (häufig), eine für alle Updates (
```powershell
# Aufgabe 1: Defender alle 4 Stunden (wie oben)
# Aufgabe 2: Volle Updates monatlich am ersten Sonntag um 03:00
$action = New-ScheduledTaskAction `
-Execute "powershell.exe" `
-Argument "-ExecutionPolicy Bypass -NoProfile -File `"C:\scripts\windows-updater\windows-updater.ps1`""
$trigger = New-CimInstance -CimClass (
Get-CimClass -Namespace "Root/Microsoft/Windows/TaskScheduler" `
-ClassName "MSFT_TaskMonthlyDOWTrigger"
) -ClientOnly -Property @{
DaysOfWeek = [int16]1 # Sonntag
WeeksOfMonth = [int16]1 # Erste Woche
Months = [int16]4095 # Alle 12 Monate
Enabled = $true
}
$trigger.StartBoundary = (Get-Date "03:00").ToString("yyyy-MM-dd'T'HH:mm:ss")
$principal = New-ScheduledTaskPrincipal `
-UserId "SYSTEM" `
-RunLevel Highest `
-LogonType ServiceAccount
$settings = New-ScheduledTaskSettingsSet `
-AllowStartIfOnBatteries `
-DontStopIfGoingOnBatteries `
-StartWhenAvailable `
-ExecutionTimeLimit (New-TimeSpan -Hours 2)
Register-ScheduledTask `
-TaskName "Windows Updater - Monthly" `
-Action $action `
-Trigger $trigger `
-Principal $principal `
-Settings $settings `
-Description "Vollständige Windows Updates monatlich"
$startDate = (Get-Date "03:00").ToString("yyyy-MM-dd'T'HH:mm:ss")
$xml = @"
<?xml version="1.0" encoding="UTF-16"?>
<Task version="1.2" xmlns="http://schemas.microsoft.com/windows/2004/02/mit/task">
<Triggers>
<CalendarTrigger>
<StartBoundary>$startDate</StartBoundary>
<Enabled>true</Enabled>
<ScheduleByMonthDayOfWeek>
<Weeks><Week>1</Week></Weeks>
<DaysOfWeek><Sunday /></DaysOfWeek>
<Months>
<January /><February /><March /><April /><May /><June />
<July /><August /><September /><October /><November /><December />
</Months>
</ScheduleByMonthDayOfWeek>
</CalendarTrigger>
</Triggers>
<Principals>
<Principal id="Author">
<UserId>S-1-5-18</UserId>
<RunLevel>HighestAvailable</RunLevel>
</Principal>
</Principals>
<Actions Context="Author">
<Exec>
<Command>powershell.exe</Command>
<Arguments>-ExecutionPolicy Bypass -NoProfile -File "C:\scripts\windows-updater\windows-updater.ps1"</Arguments>
</Exec>
</Actions>
<Settings>
<AllowStartOnDemand>true</AllowStartOnDemand>
<StartWhenAvailable>true</StartWhenAvailable>
<AllowHardTerminate>true</AllowHardTerminate>
<ExecutionTimeLimit>PT2H</ExecutionTimeLimit>
<DisallowStartIfOnBatteries>false</DisallowStartIfOnBatteries>
<StopIfGoingOnBatteries>false</StopIfGoingOnBatteries>
</Settings>
</Task>
"@
$xmlPath = "$env:TEMP\windows-updater-monthly.xml"
$xml | Out-File -FilePath $xmlPath -Encoding Unicode
schtasks.exe /Create /TN "Windows Updater - Monthly" /XML $xmlPath /F
Remove-Item $xmlPath
```
### Bestehende Aufgabe ändern